1534201661 has 8 divisors (see below), whose sum is σ = 1543953600. Its totient is φ = 1524463200.

The previous prime is 1534201657. The next prime is 1534201681. The reversal of 1534201661 is 1661024351.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1534201661 - 2² = 1534201657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1534201651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320000 + ... + 324758.

It is an arithmetic number, because the mean of its divisors is an integer number (192994200).

Almost surely, 2^1534201661 is an apocalyptic number.

It is an amenable number.

1534201661 is a deficient number, since it is larger than the sum of its proper divisors (9751939).

1534201661 is a wasteful number, since it uses less digits than its factorization.

1534201661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6739.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1534201661 is about 39168.8863895822. The cubic root of 1534201661 is about 1153.3491933084.

The spelling of 1534201661 in words is "one billion, five hundred thirty-four million, two hundred one thousand, six hundred sixty-one".